Three-way valve for sampling

Abstract

The utility model relates to the technical field of three-way valves, and discloses a three-way valve for sampling, which comprises a valve body, a channel changing mechanism and a sampling mechanism, the top end of the valve body is fixedly connected with a fixed seat, the inner wall of the valve body is rotatably connected with a ball body, the top end of the ball body is fixedly connected with a connecting block, and the connecting block is rotatably connected to the bottom of the inner wall of the fixed seat; a valve rod is arranged above the fixing seat, the bottom surface of the valve rod is slidably connected to the middle of the inner wall of the fixing seat, a square groove is formed in the bottom end of the valve rod, and the connecting block is embedded in the inner wall of the square groove; the threaded rod and the pressing rod can be driven by rotating the rotating wheel to control opening and closing of the flow stopping plate, complex tools and professional skills are not needed, opening and closing of a sampling channel can be rapidly achieved, the sampling preparation time is greatly shortened, the overall working efficiency is improved, meanwhile, sampling operation can be conducted under the dynamic working condition that water flow normally circulates, and the sampling efficiency is improved. The sampling device adapts to different pressure environments and is suitable for sampling requirements of various fluid conveying systems.

Description

Technical Field

[0001] This utility model relates to the field of three-way valve technology, and in particular to a three-way valve for sampling. Background Technology

[0002] A three-way valve is a fluid control device with three ports. By changing the position of the internal valve core, it controls the flow of fluid from one port to any of the other two ports, or simultaneously diverts the fluid to two ports, thus realizing the on / off or flow direction switching of the fluid between the three ports.

[0003] Traditional three-way valves typically lack sampling openings, making it difficult to sample the fluid within the valve body. This results in relatively cumbersome operation, low efficiency, and inconvenient testing. Therefore, an improved sampling three-way valve is proposed. Utility Model Content

[0004] In view of the above-mentioned problems of difficulty in sampling the fluid inside the three-way valve body, relatively cumbersome operation, low efficiency and inconvenient detection, this utility model is proposed.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a three-way valve for sampling, including a valve body, a channel changing mechanism and a sampling mechanism, wherein a fixed seat is fixedly connected to the top of the valve body, a ball is rotatably connected to the inner wall of the valve body, a connecting block is fixedly connected to the top of the ball, and the connecting block is rotatably connected to the bottom of the inner wall of the fixed seat;

[0006] A valve stem is provided above the fixed base. The bottom surface of the valve stem is slidably connected to the middle of the inner wall of the fixed base. A square groove is opened at the bottom end of the valve stem. The connecting block is embedded in the inner wall of the square groove. A water inlet groove is opened on the inner wall of the connecting block. A water delivery groove is opened inside the valve stem. A water outlet groove is opened on one side of the water delivery groove. The inside of the water inlet groove is connected to the inside of the water delivery groove.

[0007] A sliding groove is provided on the upper part of the inner wall of the water inlet tank. A flow stop plate is slidably connected to the inner wall of the sliding groove. Springs are movably connected to both sides of the top of the flow stop plate. The top of the springs is fixedly connected to the groove opening on the top wall of the sliding groove. The diameter of the circular plate in the middle of the flow stop plate is larger than the diameter of the water inlet tank. A rubber ring is fixedly connected to the top of the circular plate in the middle of the flow stop plate.

[0008] As a preferred embodiment, the valve stem is threaded to a threaded rod at its top end, and a rotating wheel is fixedly sleeved on the top end of the threaded rod.

[0009] As a preferred embodiment, the bottom end of the threaded rod is fixedly connected to a pressure rod, which is located inside the water delivery tank and directly above the central circular plate of the flow stop plate.

[0010] As a preferred embodiment, a sealing ring is provided on the outside of the connecting block, and the sealing ring is fixedly installed on the lower part of the inner wall of the fixing seat.

[0011] As a preferred embodiment, the valve stem is threaded with a handle on one side of its top, and a limit ring is fixedly sleeved on the bottom surface of the valve stem, with the limit ring slidably connected to the upper part of the inner wall of the fixed seat.

[0012] As a preferred embodiment, a sealing cap is fitted onto the outer surface of the middle part of the valve stem, the sealing cap is threaded to the top of the fixed seat, and the bottom end of the sealing cap contacts the top end of the limiting ring.

[0013] As a preferred embodiment, water outlet pipes are fixedly sleeved on both sides of the valve body, and water inlet pipes are fixedly sleeved on the other side of the valve body.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This utility model can drive the threaded rod and pressure rod to control the opening and closing of the stop plate by rotating the wheel. No complicated tools and professional skills are required. It can quickly open and close the sampling channel, greatly shorten the sampling preparation time, improve the overall work efficiency, and can carry out sampling operations under dynamic working conditions with normal water flow. It is suitable for different pressure environments and the sampling needs of various fluid transportation systems.

[0016] 2. This utility model achieves a seal by using a stop plate under the combined action of spring tension and fluid pressure, in conjunction with a rubber ring at the top. Even when the water flow inside the device is normal and there are pressure fluctuations, it can reliably block the connection between the inlet tank and the outlet tank, preventing fluid from accidentally flowing into the sampling channel when not sampling, thus ensuring the accuracy of the sampling results and the safety of the device operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is an enlarged structural diagram of the sphere in this utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the sphere in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Valve body; 11. Outlet pipe; 12. Inlet pipe; 3. Fixing seat; 31. Sealing ring; 4. Ball; 41. Connecting block; 42. Inlet groove; 5. Changing mechanism; 51. Valve stem; 52. Square groove; 53. Water delivery groove; 54. Limiting ring; 55. Sealing gland; 56. Rotary handle; 57. Outlet groove; 6. Sampling mechanism; 61. Rotary wheel; 62. Threaded rod; 63. Pressure rod; 64. Slide groove; 65. Flow stop plate; 66. Spring. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Reference Figures 1-5 The first embodiment of this utility model provides a three-way valve for sampling, including a valve body 1, a channel changing mechanism 5 and a sampling mechanism 6. A fixed seat 3 is fixedly connected to the top of the valve body 1, and a ball 4 is rotatably connected to the inner wall of the valve body 1. A connecting block 41 is fixedly connected to the top of the ball 4, and the connecting block 41 is rotatably connected to the bottom of the inner wall of the fixed seat 3.

[0027] A valve stem 51 is provided above the fixed base 3. The bottom surface of the valve stem 51 is slidably connected to the middle of the inner wall of the fixed base 3. A square groove 52 is opened at the bottom end of the valve stem 51. A connecting block 41 is fitted into the inner wall of the square groove 52. A water inlet groove 42 is opened in the inner wall of the connecting block 41. A water delivery groove 53 is opened inside the valve stem 51. A water outlet groove 57 is opened on one side of the water delivery groove 53. The inside of the water inlet groove 42 is connected to the inside of the water delivery groove 53.

[0028] A trough 64 is provided on the upper part of the inner wall of the water inlet trough 42. A stop plate 65 is slidably connected to the inner wall of the trough 64. Springs 66 are movably connected to both sides of the top of the stop plate 65. The top of the springs 66 is fixedly connected to the groove opening of the top wall of the trough 64. The diameter of the circular plate in the middle of the stop plate 65 is larger than the diameter of the water inlet trough 42. A rubber ring is fixedly connected to the top of the circular plate in the middle of the stop plate 65.

[0029] A threaded rod 62 is threadedly connected to the top of the valve stem 51, and a rotating wheel 61 is fixedly sleeved at the top of the threaded rod 62.

[0030] A pressure rod 63 is fixedly connected to the bottom end of the threaded rod 62. The pressure rod 63 is located inside the water delivery tank 53 and directly above the central circular plate of the stop plate 65.

[0031] Specifically, under normal water flow conditions inside the device, the stop plate 65, on the one hand, closes the water inlet 42 through the middle circular plate under the tension of the spring 66, and on the other hand, pushes the stop plate 65 upward under the pressure of the fluid. The two work together to seal the connection between the water inlet 42 and the water delivery 53 through the rubber ring at the top of the stop plate 65, preventing the fluid from entering the sampling channel.

[0032] When sampling is required, the rotating wheel 61 is rotated, which drives the threaded rod 62 to move downward, thereby pushing the pressure rod 63 to press down vertically. The pressure rod 63 acts on the middle circular plate of the stop plate 65, overcoming the elastic force of the spring 66 and the pressure of the fluid, so that the stop plate 65 slides down along the slide groove 64, thereby causing the middle circular plate of the stop plate 65 to separate from the sealing surface of the water inlet trough 42. At this time, the inside of the water inlet trough 42 is connected to the water delivery trough 53, and the fluid can flow from the sampling inlet through the water inlet trough 42 into the water delivery trough 53, and then flow outward through the water outlet trough 57 for collection.

[0033] When the sampling is finished, the rotating wheel 61 is rotated in the opposite direction, the threaded rod 62 drives the pressure rod 63 to move upward, and the elastic force of the spring 66 and the pressure of the fluid drive the stop plate 65 to move upward, thereby sealing the water inlet tank 42.

[0034] This design drives the threaded rod 62 and pressure rod 63 to control the opening and closing of the stop plate 65 by rotating the wheel 61. No complicated tools or professional skills are required. It can quickly open and close the sampling channel, greatly shorten the sampling preparation time, improve the overall work efficiency, and can carry out sampling operations under dynamic working conditions with normal water flow. It is adaptable to different pressure environments and is suitable for the sampling needs of various fluid transportation systems.

[0035] Reference Figures 1-5 This is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that a sealing ring 31 is sleeved on the outside of the connecting block 41, and the sealing ring 31 is fixedly installed on the lower part of the inner wall of the fixing base 3.

[0036] A handle 56 is threaded to one side of the top of the valve stem 51, and a limit ring 54 is fixedly sleeved on the bottom surface of the valve stem 51. The limit ring 54 is slidably connected to the upper part of the inner wall of the fixed seat 3.

[0037] A sealing cap 55 is fitted on the outer surface of the middle part of the valve stem 51. The sealing cap 55 is threaded to the top of the fixed seat 3, and the bottom end of the sealing cap 55 is in contact with the top end of the limiting ring 54.

[0038] Water outlet pipes 11 are fixedly sleeved on both sides of valve body 1, and water inlet pipes 12 are fixedly sleeved on the other side of valve body 1.

[0039] Specifically, the sealing ring 31 is tightly fitted around the outside of the connecting block 41 and is located at the lower part of the inner wall of the fixed seat 3, preventing fluid from leaking from the gap between the connecting block 41 and the fixed seat 3, and ensuring that the fluid inside the valve body 1 flows only through the set channel;

[0040] The sealing gland 55 presses the limiting ring 54 to seal the gap between the valve stem 51 and the fixed seat 3, preventing fluid from overflowing from the connection between the valve stem 51 and the fixed seat 3. On the other hand, it squeezes the limiting ring 54 to prevent the valve stem 51 from moving up and down in the fixed seat 3, ensuring that the valve stem 51 remains stable during rotation.

[0041] The fluid flowing into the inlet pipe 12 flows directly to the outlet pipe 11 on one side through the internal cavity of the valve body 1, which can achieve normal flow. By rotating the handle 56, the valve stem 51 is driven to rotate. Since the square groove 52 at the bottom of the valve stem 51 is engaged with the connecting block 41, the rotation of the valve stem 51 will drive the ball 4 to rotate synchronously, thereby changing the channel of water flow.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A three-way valve for sampling, comprising a valve body (1), a switching mechanism (5), and a sampling mechanism (6), characterized in that: The valve body (1) is fixedly connected to a fixed seat (3) at the top end, and a ball (4) is rotatably connected to the inner wall of the valve body (1). A connecting block (41) is fixedly connected to the top end of the ball (4), and the connecting block (41) is rotatably connected to the bottom of the inner wall of the fixed seat (3). A valve stem (51) is provided above the fixed seat (3). The bottom surface of the valve stem (51) is slidably connected to the middle of the inner wall of the fixed seat (3). A square groove (52) is provided at the bottom end of the valve stem (51). The connecting block (41) is fitted into the inner wall of the square groove (52). A water inlet groove (42) is provided on the inner wall of the connecting block (41). A water delivery groove (53) is provided inside the valve stem (51). A water outlet groove (57) is provided on one side of the water delivery groove (53). The inside of the water inlet groove (42) is connected to the inside of the water delivery groove (53). The upper part of the inner wall of the water inlet trough (42) is provided with a sliding groove (64). A stop plate (65) is slidably connected to the inner wall of the sliding groove (64). Springs (66) are movably connected to both sides of the top of the stop plate (65). The top of the springs (66) is fixedly connected to the groove opening of the top wall of the sliding groove (64). The diameter of the circular plate in the middle of the stop plate (65) is larger than the diameter of the water inlet trough (42). A rubber ring is fixedly connected to the top of the circular plate in the middle of the stop plate (65).

2. A three-way valve for sampling according to claim 1, characterized in that: The valve stem (51) is threaded to the top of a threaded rod (62), and a rotating wheel (61) is fixedly sleeved on the top of the threaded rod (62).

3. A three-way valve for sampling according to claim 2, characterized in that: The bottom end of the threaded rod (62) is fixedly connected to a pressure rod (63), which is located inside the water tank (53) and directly above the central circular plate of the stop plate (65).

4. A three-way valve for sampling according to claim 1, characterized in that: The connecting block (41) is fitted with a sealing ring (31), which is fixedly installed on the lower part of the inner wall of the fixing seat (3).

5. A three-way valve for sampling according to claim 1, characterized in that: The valve stem (51) is threaded to one side of the top with a handle (56), and a limit ring (54) is fixedly sleeved on the bottom surface of the valve stem (51). The limit ring (54) is slidably connected to the upper part of the inner wall of the fixed seat (3).

6. A three-way valve for sampling according to claim 1, characterized in that: A sealing cap (55) is fitted on the outer surface of the middle part of the valve stem (51). The sealing cap (55) is threaded to the top of the fixed seat (3). The bottom end of the sealing cap (55) is in contact with the top end of the limiting ring (54).

7. A three-way valve for sampling according to claim 1, characterized in that: The valve body (1) has outlet pipes (11) fixedly sleeved on both sides, and inlet pipes (12) fixedly sleeved on the other side.

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